While I can’t be sure, I assume this train is part of an effort to replace rails and points between Greven and Rheine in April 2014, especially since I read “elsewhere” that there is no space to park a construction train somewhere on the track between Münster and Rheine (“Bauarbeiten: Verspätungen auf Bahnstrecken – Deutsche Bahn saniert im Frühjahr Weichen und Schienen”).